telegraf/plugins/inputs/system/memory.go

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package system
import (
"fmt"
"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
type MemStats struct {
ps PS
}
func (_ *MemStats) Description() string {
return "Read metrics about memory usage"
}
func (_ *MemStats) SampleConfig() string { return "" }
func (s *MemStats) Gather(acc telegraf.Accumulator) error {
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vm, err := s.ps.VMStat()
if err != nil {
return fmt.Errorf("error getting virtual memory info: %s", err)
}
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fields := map[string]interface{}{
"total": vm.Total,
"available": vm.Available,
"used": vm.Used,
"free": vm.Free,
"cached": vm.Cached,
"buffered": vm.Buffers,
"active": vm.Active,
"inactive": vm.Inactive,
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"wired": vm.Wired,
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"slab": vm.Slab,
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"used_percent": 100 * float64(vm.Used) / float64(vm.Total),
"available_percent": 100 * float64(vm.Available) / float64(vm.Total),
}
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acc.AddGauge("mem", fields, nil)
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return nil
}
type SwapStats struct {
ps PS
}
func (_ *SwapStats) Description() string {
return "Read metrics about swap memory usage"
}
func (_ *SwapStats) SampleConfig() string { return "" }
func (s *SwapStats) Gather(acc telegraf.Accumulator) error {
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swap, err := s.ps.SwapStat()
if err != nil {
return fmt.Errorf("error getting swap memory info: %s", err)
}
fieldsG := map[string]interface{}{
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"total": swap.Total,
"used": swap.Used,
"free": swap.Free,
"used_percent": swap.UsedPercent,
}
fieldsC := map[string]interface{}{
"in": swap.Sin,
"out": swap.Sout,
}
acc.AddGauge("swap", fieldsG, nil)
acc.AddCounter("swap", fieldsC, nil)
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return nil
}
func init() {
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ps := newSystemPS()
inputs.Add("mem", func() telegraf.Input {
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return &MemStats{ps: ps}
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})
inputs.Add("swap", func() telegraf.Input {
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return &SwapStats{ps: ps}
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})
}